.header {
    width: 90%;
}

.sideBar {
    width: 170px;
    margin-left: 2px;
    float: left;
}

.main {
    margin-left: 180px;
    position: absolute;
    border: #aaaaaa;
    border-style: solid;
    border-width: 1px;
    border-radius: 4px;
}
